/* * Copyright (C) 2021 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.hookedonplay.decoviewlib.interpolator;

/**
 * Accelerate interpolator
 */
public class AccelerateInterpolator extends BaseInterpolator {
    /**
     * M factor
     */
    private final float mFactor;
    /**
     * M double factor
     */
    private final double mDoubleFactor;

    /**
     * Accelerate interpolator
     */
    public AccelerateInterpolator() {
        mFactor = 1.0f;
        mDoubleFactor = 2.0;
    }

    /**
     * Accelerate interpolator
     *
     * @param factor factor
     */
    public AccelerateInterpolator(float factor) {
        mFactor = factor;
        mDoubleFactor = 2 * mFactor;
    }


    /**
     * Get interpolation float
     *
     * @param input input
     * @return the float
     */
    public float getInterpolation(float input) {
        if (mFactor == 1.0f) {
            return input * input;
        } else {
            return (float) Math.pow(input, mDoubleFactor);
        }
    }
}